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The correct tool for verifying existing network connections on a server is C. Netstat. Netstat (network statistics) displays active network connections, routing tables, interface statistics, masquerade connections, and multicast memberships.

Tracert: Tracert (traceroute) is used to trace the route taken by packets from the source to the destination. It helps identify the path and latency between routers.

Ipconfig: Ipconfig is used to view and manage IP configuration settings on a local machine (such as IP address, subnet mask, default gateway, etc.). It does not provide information about existing connections.

Netstat: Netstat displays active network connections, including listening ports, established connections, and associated processes. It’s useful for troubleshooting and monitoring network activity.

Nslookup: Nslookup is used for DNS (Domain Name System) queries to resolve domain names to IP addresses. It does not provide information about existing connections.

References:

CompTIA Network+ Certification Exam Objectives